I'm guessing these are all codec files? Autoruns don't list a file location for these but selecting "jump to entry" opens the listing in the registry. I don't know If I should just delete these missing entries in autoruns or leave it alone or should I worry? I've been setting up my new 64-bit PC and I've been installing and uninstalling various software getting everything set up. I'm guessing these files got installed and removed along the way, but I'm wondering if these missing files will cause me any issues?

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Thanks everyone. So how do I replace those files though? I don't know what software originally put them there, or are they part of Windows. Should I delete the entries from autoruns? I'm afraid to do that not knowing what will happen.

bro67 said:

Yes they are Microsoft Codecs. A repair install is in order.

When you say repair install, you mean put the Windows 10 USB thumb drive that I originally used to install Windows back in and do a repair install from there? Geez, I have a lot of software installed now and set up perfectly just the way I want. And the PC is literally brand new except for me installing all my software on it. I haven't even used it yet other than setting up software. I'm nervous to do a re-install and mess up who knows how many programs along the way. Is this safe to my existing software? The thought of re-installing scares me and seems rather drastic for a couple missing codecs. Won't that wipe away all my various Windows settings and configurations? How about registry keys for my registered software, like software that requires registering with license keys? Will those break? How about my screensavers and other assorted applications, like burning software, etc.? All my software is set up perfectly and it took weeks to get it to this point. I really don't like the idea of a repair install for a couple missing codec files - I'm just afraid too many other installed programs may suddenly break.

I already ran sfc /scannow and there were no problems found. If they were part of Windows, wouldn't sfc /scannow have detected the missing files and replaced them?

Any advice?

Last edited by rivre; 29 Sep 2016 at 13:40.

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I checked my old Windows 7 PC for the heck of it and one of the 4 missing files I listed above is on my old PC - emYUV.dll. Hovering over the file on my Windows 7 PC reveals it is "Empia YUV Codec" from Microsoft.

Since I've been installing/uninstalling various software on my new Windows 10 PC, couldn't these 4 missing .dll codec files have come from one or more pieces of software, and when I uninstalled them they just left those behind? Are these files supposed to be in the system32/sysWOW64 folders by default with a fresh installation of Windows, or are they placed there as needed by media software?Do other people here have these files on their PC?Can somebody check? I did install and then uninstall a couple pieces of media software that may have installed some codecs as it needed. I don't want to go through all the trouble of a repair install just to find out that these 4 files don't even get restored because it was another piece of software that installed them. That would be a lot or trouble and risk for nothing.

Keep in mind I don't use codec packs. But as I said a couple pieces of media software (converters, etc.) may have installed/uninstalled codecs as it saw fit. So these 4 missing codec files may or may not be needed any longer. It seems rather drastic to do a repair install if I don't even know that these 4 files would get restored. My PC is running fine. I'm just worried about these 4 "mising" files.

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If you did a rollup install from 7 to 10 on that machine, there are going to be items left over that do not get removed during the upgrade process. A Clean Install is in order after you upgrade to get the 10 license. You will find that problems will go away if you start with a clean slate.

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If you did a rollup install from 7 to 10 on that machine, there are going to be items left over that do not get removed during the upgrade process. A Clean Install is in order after you upgrade to get the 10 license. You will find that problems will go away if you start with a clean slate.

I did a clean install, not upgrade. Brand new PC I built myself. Clean WIndows 10 install from a retail install USB thumb drive.

I'm still thinking these 4 files are leftovers from some media software I installed and then uninstalled along the way over the past few weeks getting my PC set up. Can anyone verify if these files are included by default with Windows 10? Does everyone else have these 4 files? If not, then I can assume they're not originally part of Windows and doesn't warrant a repair install for no reason.

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I ran Hijackthis. There's a whole bunch of things listed, including a whole bunch of "missing files" that aren't missing. But none of those files are the 4 files I listed in this thread.

Which leads me back to : What do I do about these 4 missing files? Are they needed? Do they come with Windows? I don't want to do a repair installation for no reason if it isn't even going to install these files because they came as part of a program I have already uninstalled. I don't know if I should uncheck these entries in autoruns, delete them, or what? If they are important and needed I'd like to know what to do about it. My guess is the entries are left behind from a piece of software that came with it's own .dll codecs and uninstalling it left the entries behind. Autoruns does not list the location of these 4 missing files. They aren't specifically listed as belonging in my system32/sysWOW64 folder, so they could just as easily have been in my program files folder for the software that installed them originally. I noticed a couple media converter/player programs I tried out installed their own batch of codecs to their program folders, so that may have happened here - they got uninstalled from the program folders and left the entries behind for autoruns to see. I'm just guessing here - that's why I"m asking for guidance.

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